Method of forming impressions of finger-prints.



R. E. BAUDER.

METHOD OF FORMING IMPRESSIONS 0F FiNGER .ANTS.

APPLICATION FILED DEC.13,1915.

Pmemed ug. 21, 1917.

mmw

amuemtoz attozwu so RAYMOND E. BAUDER, OF TAYLORVILLE,

PORATION OF DELAWARE;

v I, A, Y ILLINOIS, ASSIGNOR, B Y MESNE ASSIGN- I ENTS, TO BAUDER IDENTIFICATION COMPANY, OF CHICAGO, ILLINOIS, A COR- ME'IHOD OF FORMING IMPRESSIONS OF FINGER-PRINTS.

To all whom it may concern:

a citizen of the United States; residing at Taylor-ville, in the county of Christian and parts to be impressed are then pressed State of Illinois, have invented certainnew and useful -Improvements in Methods of Forming Impressions of Finger- Prints;

' and I do declare the following to be a full,

clear, and exact description of the invention, such as will enable others skilled in the art to which it appertains to makefand use the same.

This invention relates to a method of forming impressions for identification purposes, and more particularly to the formation of finger print impressions.

The object of the invention is to provide a simple and efficient method of taking impressions without the use of ink, and rendering said impressions permanentto all intents and purposes. I

iVith this and other objects in view, the invention consists ofcertain novel features of construction, and the combination and arrangementof parts to' be hereinafter particularly described and claiamcd.

In the accompanying drawing, a finger print impression is shown taken in accordtively. The combination with lampblack of In taking an impression of a finger tip or.

ance with this invention.

ball according to this invention, the part to be imprinted, which maybe a finger tip or a whole hand, a foot, or other part of the body, is-pressedon a sheet of paper 8 on which the imprint is to be formed, and-thereby leaves an invisible impression of the con tacting part, which is caused by oil contained on the member from which the impression is to be made,.the oil usually exuding from the poresof the skin being suflicient for this purpose, but when it is not sufficient, for any reason, it may be supplied by applying to the part from which the impression is to be made, a substitute oil which is preferably applied to the part in the following manner: A piece of glazed cardboard has as much of this substitute oil applied thereto as possible without becoming saturated, and when it has been properly prepared, it has the appearance of I beingv dry. The finger tips or other parts from which the impression is to be made are then Specification of Letters Patent.

Patented Aug. 21,1917.-

Application filed December 13, 1915. Serial No. 66,648.

pressed on this card, which causes suflicient of the oil to adhere to said fingertips or bther part, as is necessary for taking. the impression, and the oil. containing tips or ferent combinations of ingredients, though j a combination of cocoa butter and sweet-, or

a suitable pigment, such as a black powderwhich may be applied in any suitable manner,

- being preferably dusted back and forth-over the,impression by a camels hair or other olive-oil have been found to work very 4 soft brush. This application of the black powder will cause the impression I to stand out in black relief. The powderemployed' for this purpose is preferably composed of three parts of lampblack and one part of another suitable body' substance such as whitewheat flour; These ingredients are thoroughly mixed, and the proportions ,thereof may be varied although those above specified have been found to operatev effeca body substance insures a cleaner print than i is possible when lamp-black alone is used,

and adapts the powder to be more readily applied without smearing.

ing liquid. This fixing liquid is preferably composed of six parts more or less of woodor denatured alcohol combined with one part of white shellac. These ingredients are a allowed. to stand for about twenty [fourhours, after which time the liquid .is siphoned off, leaving the sediment to be ptherwise disposed of. This liquid is preferably applied to the print by means of a vaporizer, and after it has been so applied, the

print may be dried by the use of ordinary blotting paper or leftto dry'in the usual manner by exposure to the atmosphere. The

fixing liquid sets the pigment immediately I and renders the print sufficiently permanent for all practical purposes.

-From the foregoing description. it will be obvious that a permanent developed im pression may be taken from the linger tips or other part of the body without the use of ink, and whereby a very clear and distinct impression is produced.

While I have described in detail the best method now known to me for carrying out my invention, I wish it to be understood that I am not limited to the precise compositions of material and solutions above specified, asobvionsly other materials capable of producing the same result will suggest themselves to those skilled in the art.

I claim as my invention:

1. The method of making finger print im pressions, which consists in pressing the finger on an lI'HPIQSSlOll surface and then dusting the oily lines thus produced on such surface. with a finely divided pigment material, and then applying a fixing material, whereby theimpression is made unsmearable and adherent to the surface.

2. The method of making finger print impressions, which consists in pressing the finger on an impression surface and then dusting the oily lines thus produced on such surface with a finely divided pigment mate rial, comprising a pigment and a body material, and then applying a fixing material, whereby the impression is made unsmearable and adherent to the surface.

3. The method of making finger print impressions, which consists in pressing the finger on an impression surface and then dusting the oily-lines thus produced on such surface with a finely divided pigment material, comprising lamp black and a body material, and then applying a fixing material,

whereby the impression is made unsmearable'and adherent to the surface.

ft. The method of making finger print im- -pr essions, which consists in pressing the linger on an impression surface and, then dusting the olly hnes thus produced on such surface with a finely divided pigment material, and then applying a fixing solution,

wnei tle i pression is made'unsmearable and adherem to the surface.

o. lhe method of mali'ing finger print 1mpressions, wlnch consists in pressing the linger on the surface of a sheet of paper and face.

(i. The method of making finger print impressions, which consists in pressing the finger on an impression surface and then dusting the oily lines thus produced on such surface. with a finely divided pigment material, and then spraying over the finger prints a fixing solution, whereby the impression is made unsmearable and adherent to the surface.

7. The method ofmaking finger print im pressions, which consist in applying to the finger an impression producing material, pressing the finger on an impression surface and then dusting the lines thus produced on such surface with a finely divided pigment material, and then applying a. fixing material, whereby the impression is made unsmearable and adherent to the surface.

8. The method of making finger print in'rpressions, which consists in applying oil to the finger, pressing the finger. on an impression surface and then dusting the oily lines thus produced on such surface with a finely divided pigment material, and then applying a fixing material, whereby the. lll'llH'OS- sion is made unsmearable and adherent to the surface. I

In testin'iony whereof I have hereunto set my hand in presence of two subscribing witnesses. q I

RAYMOND E. BAUDER.

Witnesses Airrurnc A. Locum, C. A.-- Moxrim'. 

